( 343 ) 



obtained on the same day as otliers with tlie thmat nniform lilaekish, I think there 

 can lie no hjni^cr any donht (hat they merely represent the two sexes of one 

 species. 



In Western Ecnadcu' a very near ally takes tiu^ phu'.c of ,1/. laemnsticta ; it has 

 been named ^[. iiiiiiicaiidd by Salvin and Godman. Besides tlie nnsexed type from 

 Intac in the British Museum, I examined three sexed ? ? of this form whieli were 

 collected by Mr. Rosenberg's correspondents at Paramba, Lita, and l!io Verde, in 

 N.W. Ecuador. Tliese four specimens agree in the markings of tlic throat witli the 

 /rw'wo.sY/f/ft-pInmage, but differ from the f'osta Rica series in the following details. 

 The white s])ots are confined to the chin and the anterior portion of the throat ; the 

 tail is blackish (not dark rufous browu), and the back rather dnller rnfescent brown. 

 In dimensions they agree with M. laemoatictn, the wing measuring 07 — 68, the tail 

 47—49, the bill 18—20 mm. 'W'e have thus two forms : 



a. Mi/rmcciza laemosticta laemosticta Salv. 



Myrmeciza laninosticta Salvin, P. Z. S. 1864. p. 582 descr. orig. ? (Tiicurriqui, Costa Rica). 

 Mijrmc.eh.a fikl'ipterri Lawreuce, Ann. N. York Li/c. viii. (May 1SG5) p. 132 descr. jj (Angostura, 

 Costa Rica). 



Hal). Cosfa rtica (Tncurri(pii, (!arrillo) and Vvragiia (Rauta Fe). 

 4 (?c? : Wing 05-07 ; tail 45—48; bill 10 mm. 

 7 ? ? : Wing 02—00; tail 40-48 ; bill 18—10 mm. 



b. Ari/rmeciza laemosticbt nifiricamla Salv. & Godm. 

 Miirmcr'izd vUjricauda Salvin and flodman, Biolng. Ccnir. Americ. ii. (18'J2) p. i.'jO (Intac). 



Hal). Wc.sfcn, Eciiaflor : Intac (Bnckloy) ; Paramba, Lita, Rio Verde 

 (Miketta and Flemming coll. — Mus. v. Berlepsch, Monac. et Vindob.). 



41. Cercomacra hypomelaena Scl. = C. serva (Scl.) 



Pyrirjlriia srrra Sclater, P. Z. 8. IS.'iS. p. OlJ [Rio Napn, East Ecuador] ; Sclater, Cai. Binh xv. 



p. 271 [e.xcl. dcscrijition of female wliich is referaljle to C. njipnu-imaii^ 5 , ^i™! excl, specimens 



g.i]. 

 Ccrconmrm hypmnchicna Sclater, Cat. liirih Piril. ^^u^. xv. (l.SOO) p. 208 [Cosnipata. S.E. Pern]. 



Wing. Tail. Bill. 

 I. Mus. Brit. ((?) ad. Rio Napo (e.x Verreaux), coll. P. L. 



Sclater. Tyite of Pi/r/i/lriiri. serva Be]. 

 '.'. Mns. Brit, ((?)ad. 8arayacu, E. Ecuador (0. Buckley 



coll.) ex Mus. Salvin & Godman {P. scrm, specimen c). 

 ;i. Mns. Brit, (c?) ad. Sarayaeu, E. Ecuador (C. Buckley 



coll.) ex Mns. Salvin & Godman {P. serra, spec. /) . 

 4. Mus. Brit, "c?" ad. Cosnipata, S.E. Peru, Juno 2, 



1871. — II. Whitely coll. — Type of ('. hi/pomdacna 



('. Iii/jiomehii-iia has been described by a curious oversight. Mr. Sclater placed 

 it quite correctly in the genus Cercomacra, but having referred his P, scrfa to 

 another genus, he omitted to compare it with the latter species. Otherwise, 

 ho certainly would have found that both are the same. 



Goraparing throe adult Jc? of Pi/riijlcna serva (including the type) with the 

 typical specimen of t '. //i///omc/nc/ia, I i'ail lo see any dilVerence between them, except 

 that the latter has the bill very slightly narrower. It is, however, matched in this 

 respect by a female from the Rio Napo. 



